Marking machine



FIG. 1 is a side elevational view of a marking machine showing my newdesign;

FIG. 2 is a front elevational view;

FIG. 3 is a side elevational view showing the side opposite that seen inFIG. 1;

FIG. 4 is a top plan view;

FIG. 5 is a rear elevational view; and

FIG. 6 is a bottom plan view thereof.

The ornamental design for a marking machine, as shown.